Thread: Three ZTR's; One cuts shorter in reverse; Why? Solution?

This is my first post, apologies if I am re-asking an answered question or if it's common knowledge. This year I began working for a small operation mowing residential yards. My boss isn't tech savvy, and I am, but I'm not mower-savvy, yet.

The business uses three ZTR's. An older John Deere 717A 48", a brand new JD Z915B 54", and a Kubota ZG227 bagger. Both JD mowers cut evenly in forward or reverse. The Kubota cuts significantly shorter in reverse. Thank goodness it has a hydraulic deck.

My questions are (a) why does the mower do this (b) is there any way to fix it or is that the design (c) is this common in mowers, seems odd and inefficient.